The purpose of the graphite
Jiaozhou graphite mouldSmall make up to tell youThe purpose of the graphite
1. as refractory materials
Graphite and its products have the properties of high temperature resistant, high strength, mainly used in the manufacture of graphite crucible in the metallurgical industry, the graphite is commonly used in steelmaking for ingot protectant, metallurgical furnace lining.
2. As a conductive material
Used for manufacturing electrodes in electrical industry, carbon brush, rods, tubes, the anode, to the mercury is graphite gaskets, telephone, television tube coating, etc.
3. As wear-resistant lubricating materials
Graphite as a lubricant in mechanical industry. Lubricating oil can not be used in high speed, high temperature and high pressure conditions, and graphite wear-resisting material can be in 200 ~ 2000 ℃ temperature under high sliding velocity, no lubricating oil. Many transport corrosive medium equipment, widely used graphite material, the piston cup, seal and bearing, they dont need to add lubricating oil during operation. Graphite is when a lot of metal processing (wiredrawing, laguan) good lubricant.
4. Casting, aluminum casting, molding and high temperature metallurgical materials
Due to the small thermal expansion coefficient of graphite, and ability to the change of the thermal shock, can be used as glass mold, after using graphite black metal casting dimension precision, smooth surface high yield, without processing or make a little processing can use, thus saving a large amount of metal. Production of cemented carbide powder metallurgy process, usually made from graphite material molding and sintering with porcelain boat. Monocrystalline silicon crystal growth of crucible, zone refining containers, stent fixture, induction heater is made by a high purity graphite. In addition of graphite can make vacuum smelting graphite heat insulation plate and the base, high temperature resistance furnace furnace tube, rod, plate, tents and other components.
5, used in the atomic energy industry and national defense industry
Graphite has good neutron moderator used in nuclear reactors, uranium graphite reactor is applied more an atomic reactor. As power use nuclear reactor in deceleration material should have high melting point, stability, corrosion resistance performance, graphite can completely satisfy the above requirement. As atomic reactor with graphite requires high purity, impurity content should not be more than dozens of PPM. Especially the boron content should be less than 0.5 parts per million. In the defense industry is also made of graphite solid rocket nozzle, missile nose cones, space navigation equipment parts, insulation materials and the ray material.
